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Accept any trailing garbage in messages, not just the Microsoft AXFR request

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variety, logging a message at debug level 1.  We may or may not add an option to make this
conditional.
This commit is contained in:
Andreas Gustafsson 2000-11-22 23:09:58 +00:00
parent 5404e14bbb
commit 83c45e69f8
1 changed files with 5 additions and 13 deletions
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18
lib/dns/message.c
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@ -15,7 +15,7 @@
* WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. * WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/ */
/* $Id: message.c,v 1.158 2000/11/14 23:29:51 bwelling Exp $ */ /* $Id: message.c,v 1.159 2000/11/22 23:09:58 gson Exp $ */
/*** /***
*** Imports *** Imports
@ -1458,14 +1458,12 @@ dns_message_parse(dns_message_t *msg, isc_buffer_t *source,
isc_result_t ret; isc_result_t ret;
isc_uint16_t tmpflags; isc_uint16_t tmpflags;
isc_buffer_t origsource; isc_buffer_t origsource;
isc_boolean_t best_effort;
isc_boolean_t seen_problem; isc_boolean_t seen_problem;
REQUIRE(DNS_MESSAGE_VALID(msg)); REQUIRE(DNS_MESSAGE_VALID(msg));
REQUIRE(source != NULL); REQUIRE(source != NULL);
REQUIRE(msg->from_to_wire == DNS_MESSAGE_INTENTPARSE); REQUIRE(msg->from_to_wire == DNS_MESSAGE_INTENTPARSE);
best_effort = ISC_TF(options & DNS_MESSAGEPARSE_BESTEFFORT);
seen_problem = ISC_FALSE; seen_problem = ISC_FALSE;
origsource = *source; origsource = *source;
@ -1532,16 +1530,10 @@ dns_message_parse(dns_message_t *msg, isc_buffer_t *source,
isc_buffer_remainingregion(source, &r); isc_buffer_remainingregion(source, &r);
if (r.length != 0) { if (r.length != 0) {
if (r.length == 2 && r.base[0] == 'M' && r.base[1] == 'S') { isc_log_write(dns_lctx, ISC_LOGCATEGORY_GENERAL,
isc_log_write(dns_lctx, ISC_LOGCATEGORY_GENERAL, DNS_LOGMODULE_MESSAGE, ISC_LOG_DEBUG(1),
DNS_LOGMODULE_MESSAGE, ISC_LOG_INFO, "message has %u byte(s) of trailing garbage",
"message has nonstandard Microsoft tag"); r.length);
} else {
if (best_effort)
seen_problem = ISC_TRUE;
else
return (DNS_R_FORMERR);
}
} }
msg->saved = isc_mem_get(msg->mctx, sizeof(isc_region_t)); msg->saved = isc_mem_get(msg->mctx, sizeof(isc_region_t));